Attachment 04 - Tank Diagram.pdf

This is a technical drawing specification for an LPG (liquefied petroleum gas) storage tank with manufacturer's fittings. The drawing illustrates a horizontal cylindrical storage tank with a water capacity of 10,000 gallons, measuring 38 feet 0 inches in length and 8 feet in diameter, supported on a concrete pad foundation. The tank is designed to operate at a maximum fill of 80 percent and includes multiple operational openings and safety features.

The tank design incorporates two primary fitting arrangements: Type I and Type III. Type I includes an excess flow valve, globe valve, 1/4-inch hydrostatic relief valve set at 450 PSIG, and a check valve located on the tank opening. Type III features an internal valve, pneumatic cycle regulator, globe valve, 1/4-inch hydrostatic relief valve set at 450 PSIG, and an internal valve configuration. The specification details indicate that liquid withdrawal occurs from a truck unloading station and vapor return to the truck unloading station, with provisions for liquid bypass (not used), vapor bypass (not used), a 4-inch multiport relief valve, and auxiliary vapor gauge ranging from 50-150 degrees Fahrenheit. Tank design criteria specify that the center of gravity of the tank and supporting structure must accommodate horizontal restraint per civil engineering design standards, with all materials and devices to be furnished and installed by the contractor. The drawing emphasizes that lateral force design considerations apply as building-applied loads.